Linux下实现不同网段之间的访问

步骤1:查看本机IP地址

[root@localhost root]# ifconfig

eth0 Link encap:Ethernet HWaddr 00:0C:29:A7:6E:77

inet addr:10.0.0.120 Bcast:10.0.0.255 Mask:255.255.255.0

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:2418 errors:0 dropped:0 overruns:0 frame.:0

TX packets:1293 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:100

RX bytes:1000347 (976.9 Kb) TX bytes:192592 (188.0 Kb)

Interrupt:10 Base address:0x2024

步骤2:添加路由规则

[root@localhost root]# route add -net 192.168.2.0/24 eth0

步骤3:查看路由规则

[root@localhost root]# route

Kernel IP routing table

Destination Gateway Genmask Flags Metric Ref Use Iface

10.0.0.0 * 255.255.255.0 U 0 0 0 eth0

192.168.2.0 * 255.255.255.0 U 0 0 0 eth0

169.254.0.0 * 255.255.0.0 U 0 0 0 eth0

注：route规则中，必须同时存在两个网段，否则,一个网段的IP地址将无法访问到另一网段的IP地址。

步骤4:检测本地机(IP:10.0.0.120)与远程机(IP:192.168.2.80)是否可互访.

[root@localhost root]# ping 192.168.2.80

PING 192.168.2.80 (192.168.2.80) 56(84) bytes of data.

64 bytes from 192.168.2.80: icmp_seq=1 ttl=127 time=5.51 ms

64 bytes from 192.168.2.80: icmp_seq=2 ttl=127 time=3.17 ms

步骤5:删除路由规则

[root@localhost root]# route del -net 192.168.2.0/24 eth0